How to reverse a number in c

#include<stdio.h>
int rev(int);
int main()
{
	int n;
	printf("Enter a number\n");
	scanf("%d",&n);
	int ans;
	ans=rev(n);
	printf("The reversed no. is %d",ans);
}
int rev(int n)
{
	int num=0;
	while(n!=0){
	num=n%10+10*num;
	n=n/10;}
	return(num);
}